将文本字段内容发布到 Firebase 数据库

Question

我是一个新手，试图将我的应用连接到后端（Firebase 数据库）。具体来说，我有四个字段，用户可以在其中输入内容，并且我试图将一个子节点设置为与每个字段相等。不幸的是，虽然我没有收到任何错误，但数据库中没有任何帖子。我不确定我是否遗漏了一些大或小的东西，所以任何指导都会非常感激。代码如下：

class ThirdViewController: UIViewController {


var ref:FIRDatabaseReference!

@IBOutlet weak var bookTitle: UITextField!

@IBOutlet weak var bookDescription: UITextField!

@IBOutlet weak var authorBiography: UITextView!

@IBOutlet weak var bookPurchaseLink: UITextView!


@IBAction func saveButtonTapped(_ sender: Any) {

    let bookTitleContent = String(describing: bookTitle.text)

    let bookDescriptionContent = String(describing: bookDescription.text)

    let authorBiographyContent = String(describing: authorBiography.text)

    let bookPurchaseLinkContent = String(describing: bookPurchaseLink.text)

    func viewDidLoad() {
        super.viewDidLoad()

    //post to database

    ref = FIRDatabase.database().reference()

    self.ref.child(uuid).child("Book Info").child("Book Title").setValue(bookTitleContent)

    self.ref.child(uuid).child("Book Info").child("Book Description").setValue(bookDescriptionContent)

    self.ref.child(uuid).child("Book Info").child("Author Biography").setValue(authorBiographyContent)

    self.ref.child(uuid).child("Book Info").child("Book Purchase Link").setValue(bookPurchaseLinkContent)


    }


}

Answer 1

检查 Firebase 规则以进行读写。！

{
  "rules": {
    ".read": "auth != null",
    ".write": "auth != null"
  }
}

    mdatabase = FirebaseDatabase.getInstance();
    mdatabaseReference = mdatabase.getReference();
 mdatabaseReference.child("Child").setValue(Data);

//

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